[PATCH v4 0/1] MR3331: ntdll/tests: Add more reparse/junction point tests.

[Alex Henrie (＠alexhenrie)]

Based on a patch by Erich E. Hoover.

--
  v4: ntdll/tests: Add more reparse/junction point tests.

https://gitlab.winehq.org/wine/wine/-/merge_requests/3331

[PATCH v4 1/1] ntdll/tests: Add more reparse/junction point tests.

[Alex Henrie]

From: Alex Henrie

Based on a patch by Erich E. Hoover.
---
 dlls/ntdll/tests/file.c | 139 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)

diff --git a/dlls/ntdll/tests/file.c b/dlls/ntdll/tests/file.c
index fc7a6e82059..1c2b96e67ca 100644
--- a/dlls/ntdll/tests/file.c
+++ b/dlls/ntdll/tests/file.c
@@ -38,6 +38,7 @@
 #include "winuser.h"
 #include "winioctl.h"
 #include "winnls.h"
+#include "ddk/ntifs.h"

#ifndef IO_COMPLETION_ALL_ACCESS
 #define IO_COMPLETION_ALL_ACCESS 0x001F0003
@@ -5672,6 +5673,33 @@ static void test_mailslot_name(void)
     CloseHandle( device );
 }

+static INT build_reparse_buffer(const WCHAR *filename, REPARSE_DATA_BUFFER **out)
+{
+    static const INT header_size = offsetof(REPARSE_DATA_BUFFER, GenericReparseBuffer);
+
+    INT buffer_size, struct_size, data_size, string_len, prefix_len;
+    WCHAR *subst_dest, *print_dest;
+    REPARSE_DATA_BUFFER *buffer;
+
+    struct_size = offsetof(REPARSE_DATA_BUFFER, MountPointReparseBuffer.PathBuffer[0]);
+    prefix_len = strlen("\??\");
+    string_len = wcslen(&filename[prefix_len]);
+    data_size = (prefix_len + 2 * string_len + 2) * sizeof(WCHAR);
+    buffer_size = struct_size + data_size;
+    buffer = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, buffer_size);
+    buffer->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
+    buffer->ReparseDataLength = struct_size - header_size + data_size;
+    buffer->MountPointReparseBuffer.SubstituteNameLength = (prefix_len + string_len) * sizeof(WCHAR);
+    buffer->MountPointReparseBuffer.PrintNameOffset = (prefix_len + string_len + 1) * sizeof(WCHAR);
+    buffer->MountPointReparseBuffer.PrintNameLength = string_len * sizeof(WCHAR);
+    subst_dest = &buffer->MountPointReparseBuffer.PathBuffer[0];
+    print_dest = &buffer->MountPointReparseBuffer.PathBuffer[prefix_len + string_len + 1];
+    wcscpy(subst_dest, filename);
+    wcscpy(print_dest, &filename[prefix_len]);
+    *out = buffer;
+    return buffer_size;
+}
+
 static void test_reparse_points(void)
 {
     OBJECT_ATTRIBUTES attr;
@@ -5680,6 +5708,12 @@ static void test_reparse_points(void)
     NTSTATUS status;
     UNICODE_STRING nameW;
     unsigned char reparse_data[1];
+    WCHAR path[MAX_PATH], reparse_path[MAX_PATH], target_path[MAX_PATH], volnameW[MAX_PATH];
+    WCHAR volW[] = L"c:\";
+    REPARSE_DATA_BUFFER *buffer = NULL;
+    DWORD ret, len, flags;
+    WCHAR *long_path;
+    int i;

pRtlInitUnicodeString( &nameW, L"\??\C:\" );
     InitializeObjectAttributes( &attr, &nameW, 0, NULL, NULL );
@@ -5698,6 +5732,111 @@ static void test_reparse_points(void)
     ok( status == STATUS_NOT_A_REPARSE_POINT, "expected %#lx, got %#lx\n", STATUS_NOT_A_REPARSE_POINT, status );

CloseHandle( handle );
+
+    /* Create a temporary folder for the junction point tests */
+    GetTempFileNameW(L".", L"foo", 0, path);
+    DeleteFileW(path);
+    if (!CreateDirectoryW(path, NULL))
+    {
+        win_skip("Unable to create a temporary junction point directory.\n");
+        return;
+    }
+
+    /* Check that the volume this folder is located on supports junction points */
+    pRtlDosPathNameToNtPathName_U(path, &nameW, NULL, NULL);
+    volW[0] = nameW.Buffer[4];
+    pRtlFreeUnicodeString(&nameW);
+    if (!GetVolumeNameForVolumeMountPointW(volW, volnameW, MAX_PATH))
+    {
+        win_skip("Failed to obtain volume name for current volume.\n");
+        return;
+    }
+    GetVolumeInformationW(volnameW, 0, 0, 0, &len, &flags, 0, 0);
+    if (!(flags & FILE_SUPPORTS_REPARSE_POINTS))
+    {
+        skip("File system does not support reparse points.\n");
+        RemoveDirectoryW(path);
+        return;
+    }
+
+    /* Create the folder to be replaced by a junction point */
+    wcscpy(reparse_path, path);
+    wcscpy(reparse_path, L"\reparse");
+    ret = CreateDirectoryW(reparse_path, NULL);
+    ok(ret, "Failed to create junction point directory.\n");
+
+    /* Create a destination folder for the junction point to target */
+    wcscpy(target_path, path);
+    for (i = 0; i < 1; i++)
+    {
+        wcscat(target_path, L"\..\");
+        wcscat(target_path, path);
+    }
+    wcscat(target_path, L"\target");
+    ret = CreateDirectoryW(target_path, NULL);
+    ok(ret, "Failed to create junction point target directory.\n");
+    pRtlDosPathNameToNtPathName_U(path, &nameW, NULL, NULL);
+
+    /* Construct a too long pathname (resulting reparse buffer over 16 kiB limit) */
+    long_path = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, 32767);
+    wcscpy(long_path, nameW.Buffer);
+    for (i = 0; i < 250; i++)
+    {
+        wcscat(long_path, L"\..\");
+        wcscat(long_path, path);
+    }
+    wcscat(long_path, L"\target");
+
+    /* Create the junction point */
+    handle = CreateFileW(reparse_path, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING,
+                         FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, 0);
+    if (handle == INVALID_HANDLE_VALUE)
+    {
+        win_skip("Failed to open junction point directory handle (0x%lx).\n", GetLastError());
+        goto cleanup;
+    }
+    len = build_reparse_buffer(long_path, &buffer);
+    ret = DeviceIoControl(handle, FSCTL_SET_REPARSE_POINT, (void *)buffer, len, NULL, 0, &ret, 0);
+    ok(!ret && GetLastError() == ERROR_INVALID_REPARSE_DATA, "Unexpected error (0x%lx)\n", GetLastError());
+    HeapFree(GetProcessHeap(), 0, buffer);
+    CloseHandle(handle);
+
+    /* Construct a long pathname to demonstrate correct behavior with very large reparse points */
+    pRtlDosPathNameToNtPathName_U(path, &nameW, NULL, NULL);
+    wcscpy(long_path, nameW.Buffer);
+    for (i = 0; i < 200; i++)
+    {
+        wcscat(long_path, L"\..\");
+        wcscat(long_path, path);
+    }
+    wcscat(long_path, L"\target");
+
+    /* use a sane (not obscenely long) target for the rest of testing */
+    pRtlFreeUnicodeString(&nameW);
+    pRtlDosPathNameToNtPathName_U(target_path, &nameW, NULL, NULL);
+
+    /* Create the junction point */
+    handle = CreateFileW(reparse_path, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING,
+                         FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, 0);
+    if (handle == INVALID_HANDLE_VALUE)
+    {
+        win_skip("Failed to open junction point directory handle (0x%lx).\n", GetLastError());
+        goto cleanup;
+    }
+    len = build_reparse_buffer(long_path, &buffer);
+    ret = DeviceIoControl(handle, FSCTL_SET_REPARSE_POINT, (void *)buffer, len, NULL, 0, &ret, 0);
+    ok(ret, "Failed to create junction point! (0x%lx)\n", GetLastError());
+    CloseHandle(handle);
+
+cleanup:
+    pRtlFreeUnicodeString(&nameW);
+    HeapFree(GetProcessHeap(), 0, long_path);
+    HeapFree(GetProcessHeap(), 0, buffer);
+    ret = RemoveDirectoryW(reparse_path);
+    ok(ret, "Failed to remove temporary reparse point directory!\n");
+    ret = RemoveDirectoryW(target_path);
+    ok(ret, "Failed to remove temporary target directory!\n");
+    RemoveDirectoryW(path);
 }

START_TEST(file)

[PATCH v4 1/1] ntdll/tests: Add more reparse/junction point tests.

[Marvin]

Hi,

It looks like your patch introduced the new failures shown below.
Please investigate and fix them before resubmitting your patch.
If they are not new, fixing them anyway would help a lot. Otherwise
please ask for the known failures list to be updated.

The tests also ran into some preexisting test failures. If you know how
to fix them that would be helpful. See the TestBot job for the details:

The full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=137796

Your paranoid android.

=== w1064v1809 (64 bit report) ===

ntdll:
file.c:5800: Test failed: Unexpected error (0x0)